General Description

The AAT1150 SwitchReg™ is a member of AnalogicTechs Total Power Management IC™ (TPMIC™) product family. The step-down switching converter is ideal for applications where high efficiency, small size, and low ripple are critical. Able to deliver 1A with internal power MOSFETs, the current-mode controlled IC provides high efficiency using synchronous rectification. Fully internally compensated, the AAT1150 simplifies system design and lowers external parts count.

The AAT1150 is available in an MSOP-8 package and is rated over the -40°C to +85°C temperature range.

Features

• VIN Range: 2.7V to 5.5V

• Up to 95 Efficiency

• 110mΩ RDS(ON) MOSFET Switch

• <1.0µA of Shutdown Current

• 1MHz Switching Frequency

• Fixed or Adjustable VOUT: 1.0V to 4.2V

• High Initial Accuracy: ±1

• 1.0A Peak Current

• Integrated Power Switches

• Synchronous Rectification

• Internally Compensated Current Mode Control

• Constant PWM Mode for Low Output Ripple

• Internal Soft Start

• Current Limit Protection

• Over-Temperature Protection

• MSOP-8 package

• -40°C to +85°C Temperature Range

Applications

• Cable/DSL Modems

• Computer Peripherals

• High Efficiency Conversion From 5V or 3.3V Supply

• Network Cards

• Set-Top Boxes